Mmastodon LifeHome & Garden first seen 4 d ago, last 4 d ago, peak #7

Hobbyist connects Arduino breadboard to Siemens PLC at 24V

Original: I wanted to use my Arduino breadboard, LEDs and pushbuttons with my Siemens PLC, but I was afraid it was 5V-only. A litt

An electronics hobbyist has adapted an Arduino breadboard setup, with LEDs and pushbuttons, to work with a Siemens PLC. Worried the components were 5V-only, the person removed the optocoupler stage, powered the breadboard directly from the PLC's 24V supply, recalculated LED resistors and rewired accordingly. The adaptation is drawing attention from makers interested in bridging hobbyist electronics with industrial control equipment.

Why now: It is a practical, hands-on hack showing how to interface low-voltage hobbyist electronics with industrial 24V control systems.

ArduinoSiemensPLC

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Evidence

• I wanted to use my Arduino breadboard, LEDs and pushbuttons with my Siemens PLC, but I was afraid it was 5V-only. A little courage, some rewiring: removed the 5V optocoupler stage, powered the breadboard from the PLC's 24V supply, calculated the right LED resistors and adapted… · nickbearded · 7

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